2023 United States East Coast wildfire smoke

Beginning in March 2023, and with increased intensity starting in June, Canada was affected by a record-setting series of wildfires. All 13 provinces and territories were affected, with large fires in Alberta, British Columbia, the Northwest Territories, Nova Scotia, Ontario, and Quebec. The 2023 wildfire season had the most area burned in Canada's recorded history, surpassing the 1989, 1995, and 2014 fire seasons, as well as in recorded North American history, surpassing the 2020 Western US wildfire season.